Finsen (Moon)

Named after Niels Ryberg Finsen - Danish phototherapist; Nobel laureate (1860-1904).

Finsen is a lunar impact crater that is located in the southern hemisphere,. It is attached to the southeastern exterior of the walled plain Leibnitz, and the ejecta from Finsen covers the southeastern part of Leibnitz's interior floor. To the southwest is another walled plain, Von Kármán, partly overlain by Leibnitz. This is a young impact crater with well-defined features that have not been significantly eroded by subsequent impacts. (wikipedia entry)

A crater is a circular depression likely created by an impact event. On the Moon they are named after deceased scientists, polar explorers, astronauts or cosmonauts.